In my bathroom the tap in my sink for hot water there is no water coming out but there is water coming out of all other taps hot and cold. What could be the problem help.

First step is to remove the aerator, any change?

Is this a single hot water tap? If so then if removing the aerator didn't help then shut the water off to the tap and open it up. Check and clean out any trash you find. Now place a pan over the open valve and turn the water back on to flush out the supply. Reassemble and test. Do you have water now? Tom